Doorlatch



Feb. 21, 1933. 1 QUARNSTRQM 1,898,975

DOORLATCH Filed Jan. 26, 1931 2 Sheets-Sheet l A TTORNE Y.

Feb. 21, 1933. g QUARNSTROM 1,898,975

DOORLATCH Filed Jan. 26, 1951 2 Sheets-Sheet 2 ATTORNEY;

on line 33 of Fig. 2.

Patented Feb. 21, 1933 STATES ver T- N re l r e- 3 '11 v M Q lQAlt; ss nce e write TUBING 0- OF DETROIT! MECHIQAN, e ee-emu ator MIQHlQ-E noonreron 7 Application filed January 26, 1931. Serial No. 511,205.

Another object of the invention is to. providea door latch that is composed principally of sheet metal parts so that the manufacturing cost is comparatively inexpensive, w and further that the parts are so constructed that the latch may be assembled as a unit Without the use of screws or threaded parts.

Another object of the invention is the pro vision of a latch which is operable by a plunger positioned on the inside and one on 1 the outside of the door and an actuator element for retracting the bolt floating between the inner ends of the plungers and the actuator extending through a slot in the bolt and: provided with a V groove so that as 0 either plunger is pressed in towardthe door the bolt will be retracted from locking-engagement with the striker plate. Another object of the invention is the provision of a latch which maybe assembled.

with; doors of varying thicknesses without changing anyof the parts and without detracting from the appearance of the latch when assembled with the'door.

These objects and the several novel features'of the invention are hereinafter more fully described and'clairned and the preferred form of construction by which these objects are attained is shown in the 'accom- A M panying drawings in which-- latch assembled to a door.

Fig. 2 is a top plan View thereof. Fig. 3 is an enlarged sectional View taken 49 Fig. if is a detailview of the channel shaped member for carrying the bolt.

Fig; 5 is a section taken substantially on line '5'5f of Fig.1, showing the bolt in the extended position. a Fig. 6 isa similar view showing the bolt in the retracted position.

Fig. 7 is'a section taken on line 7'7 of Fig. 5 showingthe' means for locking the bolt in the extended position. Re'fer'ring now to the drawings it will be Fig. l is aside elevat on of my improved seen that the door 1 is provided with. the aperture 2; for receiving the tube like memher 8 therein. The outer endof thetube like member 3 is curved inwardlyas indicated at 4 and is provided atits end with the aperture 5 for receivingthe plunger 6 therein. The inner" end: of the plunger '6: is provid'edwith the flange end 7 oia diameter slightly less than the inner diameter ofv the tube like member 3. A'spring 8 encircles the plunger 6 and has one end abut-v ting the flange r and the'other end abutting the curvedinturned portion 4 of the tube 3. A handle 9 has its lower end's'crewed to the outside of thedoor as indicatedat l0 and the upper end of the same is formedwith an ELPPIOXl-InatQl-YSqJlME-POI hlOD. 11:, the same. being screwed to the outside of: the door as indicated at 12. y

The portion 11: isformed centrally thereof with the-aperture 13 forming a snug fit for the outer diameter of-the tube 3 and the portion around the aperture is tormed with theraisedor beaded-portionlt; The tube 3, at its inner-enchis open asindicated at 15 and a channel shaped member .16 is secured to the tube 3- interniediate the endsthereofi bythe criinpedout" portions 17. The channel shaped member 16 is formed with a base portion"18 and-theside walls 19 and, asshown in Fig 4, the sidewalls are provided;

adj ac'ent their ends with; the indent's 20,- for" a purpose to be later described-.1 A housing 21 is provided'with the flanged portions 22 the same being secu-r'ed to the inner side of the doorby'means ofthe screws 23; A pull knob 24, is rigidly secured to the housing 21, as indicated at 25' and the outer end of the same is; provided with an aperture 26 for guiding the plunger 27' therein, the same being similar-to the plunger 26' and provided with a flanged end 28 of; a diam eter slightly less than the inner diameter, of the barrel portion 29 formed integral withthe pull knob 24:. A spring 30encircles the plunger 275 one end abuttingthe flanged portion 28 of the same and: the other end abutting the pull-knob 24. An actuatoriil more clearly shown in Figs. 3,5 and 6, is positioned betweenthe' inner ends of the 55 be inserted through 36, the same being beveled as indicated at 37 for permittin the bolt to enter the aperture 38 provide in the striker plate 39. A flat plate 40 extends from the enlarged portion 36 and is provided centrally thereof with the aperture 41 of a length at least equal to the width of the actuator 31. The end wall 42 of the aperture 41 is beveled at each side, as will be more readily understood by reference to Figs. 5 and 6, so that so as the actuator is moved in either direction the bolt will be retracted and when either of the shoulders 33, or 34 strike the side of the plate 40, the actuator will reach the limit of its movement. A coiled spring 43 encircles the plate 40 and one end abuts the enlarged rtion 36 of the bolt while the other on abuts the tube 3. It will be understood that the tube 3,.is-provided with suitable apertures 44 for permitting the plate to be slidable therein. A lock 45 is provided in one end of the housing 21 and consists of an .angle'46 and a pin 47 having an enlarged head 48 secured thereto. The pin 47 extends through an elongated aperture 35 49 in the housing 21, as will be more clearly understood by reference to Fig. 7, and a flat spring 50 is interposed between the angle iron 45 and the inner face of the end wall of the housing to maintain the lock in any position it is desired to be left.

By moving the lock 45 to the right in Fig. 7 the inturned portion 52 will be moved over the endof the bolt 35 thus reventin the same from being retracted. Y the loc 45' is on the inside of the door the bolt may be left in the locked position thus preventing anyone from the outside from o ning the door unless the lockis moved to e unlocked position. It will thus be seen that as either plunger 6 or 27 is pressed in toward the door the bolt will be retracted and when the pressure is removed from the plunger, the spring 43 will move the bolt 35 to the extended position as the beveled end 42 of 55 the aperture 41 will be moved down the inclined face of the notch 32 until it has reached the position at the bottom ofthe V notch. When it is desired to assemble the latch the plunger 6, having the spring 8 thereon, will be inserted through the aperture 4 formed in the end of the tube 3, the same havin previously been assembled to the channel aped member 16. The belt 35 having the sprintgl 43 thereon will then e apertures 44 formed in the tube 3 and the same forced in against the action of the s ring until the aperture 41 in the plate 40 as come into alignment with the interior of the tube 3. The actuator 31 will then be inserted into the tube and through the aperture 41 in the plate 40 until the V notch 32 has come into allgnment with the bolt whereupon the bolt 36 may be released. The channel shaped member 16 may then be pressed into the housing 21 and the indents 20 on the channel shaped member will bind against the inner sides of the housing holding the member 16 in place in the housing.

It W1 1 be understood that the pull knob 24, having the plunger 27 inserted therein, will have been previously assembled to the housing so that when the channel shaped member 16 has been assembled with the housing 21 the whole unit will be ready for insertion in the door, which has previously been provided with the a rture 2 for receiving the tube 3 therein. Y: will be seen that the rounded end 4 of the tube 3 will extend a suflicient distance through the outside of the door to allow the s uared portion 11 of the handle 9 to be placed thereover. The screws 10 and 12 will then be screwed into the door and likewise the screws 23 for securing the housing 21 will be screwed to the inner face of the door and the latch will then be ready for operation.

By the construction heretofore described it will be seen that the latch may be applied to doors of varying thicknesses without altering any of the parts, as the tube 3 will simply extend through the squared portion 11 of the handle 9 to a greater or less degree dependin upon the thickness of the door.

From t e foregoing description it becomes evident that I have provided a latch which may be quickly and easily assembled as a unit without any screws or threaded parts and when the latch has been assembled as a unit the same may be assembled quickl to doors of varying thicknesses without a tering or changing any of the parts and without detracting from the appearance of the latch when assembled to a door.

' Having thus fully described my invention its utility and mode of operation, what i claim and desire to secure by Letters Patent of the United States is- 1. A door latch comprising a tube like member, a pair of spring-pressed plungers positioned at opposite ends respectively of the tube member, an actuator element slidable in the tube, said actuator element being unconnected with the plungers and having its respective opposite ends engaged thereby, the actuator element having a V notch in one edge thereof, a bolt-extending through the tube like member and rovided with an aperture, the end wall of t e aperture in the bolt engaging in the V notch in the actuator whereby movement will be imparted to the bolt upon movement of either of the plungers.

2. A door latch comprising a tube like member, a pair of spring-pressed plungers positioned at opposite ends respectively of the tube member, an actuator element slidable in the tube, said actuator element being unconnected with the plungers and having its respective opposite ends engaged thereby, the actuator element having a J notch in one edge thereof, a housing adapted to be secured to the inner face of the door, and provided with an aperture on one end thereof, a bolt slidable in the housing and having one end projecting through the aperture in the housing, the other end of the bolt extending through the tube like member and provided with an aperature, the end wall of the aperture in the bolt en aging in the V notch in the actuator whereby movement will be imparted to the bolt upon movement of either of the plungers.

3. A door latch comprising a tube like member, a pair of spring-pressed plungers positioned at opposite ends respectively of the tube member, an actuator element slidable in the tube, said actuator element being unconnected with the plungers and having its respective opposite ends engaged thereby, a bolt positioned at right angles to the tube like member and connected to the actuator element in such a manner that movement of either plunger will impart movement to the bolt.

4. A door latch comprising a tube like member, a plunger nositioned in each end of the same, an actuator element slidable in the tube, a bolt positioned at right angles to the tube and connected to the actuator element in such a manner that movement of either plunger will impart movement to the bolt, and a handle adapted to be connected to one side of a door and provided with an aperture through which one end of the tube, and the respective plunger projects thereby permitting the latch to be assembled with doors of varying thicknesses without changing any of the parts thereof.

A door latch comprising a tube like. member, a spring-pressed plunger positioned in each end of the same, an actuator element slidable in the tube, the ends of the same being unconnected with but engaged by the inner ends of the said plungers, a bolt rositioned at right angles to the tube and connected to the actuator element in such a manner that movement of either lunger will impart movement to the bolt, and a handle adapted to be connected to one side ofa door and provided, with an aperture through which one end of the tube and the respective plunger nroiects permitting the latch to be assembled with doors of varying thicknesses without changing any of the parts thereof.

6. A door latch comprising a tube like member, a pair of spring-pressed plungers positioned at opposite ends respectively of the tube member, an actuator element slidable in the tube, said actuator element being unconnected with the plungers and having its respective ends in abutting relation with the inner ends of the said plungers, the actuator element having a l' notch in one edge thereof, a bolt extending through the tube like member and provided with an aperture, the end wall of the aperture in the bolt engaging in the V notch in the actuator whereby retracting movement will be imparted to the bolt upon movement of either of the plungers, and a handle adapted to be connected to one side of a door and provided with an aperture through which one end of the tube and the respective plunger projects thereby permitting the latch to be assembled with doors of varying thicknesses without changing any of the parts thereof.

4. A door latch comprising a tube like 'member, a pair of spring-pressed plunger-s each respectively positioned in an end of the tube, an actuator element slidable in the tube and having a V notch cut in one side thereof, said notch terminating in spaced shoulder portions, a bolt having an aperture, the end wall of which engages in the notch of the actuator, whereby retracting movement may be imparted to the bolt upon movement of either plunger and the actuator may be limited in movement by reason of a shoulder portion of the notch engaging the bolt.

In testimony whereof I sign this specification.

1 AN T. QUARNSTROM. 

